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Proof of License

The proof of license label is the orange label, accompanying the installation media, that contains a 25-character product key. The words "Proof of License" appear on the label. The proof of license label cannot be purchased separately. Versions of the label prior to the release of Windows XP Service Pack 2 did not contain significant security features, such as the security thread, microprint, or the words "Proof of License," and are, therefore, not shown below.

Proof of License(Released with Windows XP Service Pack 2)
Proof of License (Released with Windows XP Service Pack 2)

Released with Windows XP Service Pack 2, the proof of license label is the orange label, affixed to the installation CD holder, that contains a 25-character product key. A security thread displaying the words "MICROSOFT GENUINE" has been woven into the label. The words "Authentic Software" also appear on the thread in multicolor ink. Furthermore, the words "Proof of License" appear on the label.

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Genuine Microsoft Software
Genuine Microsoft Software

Genuine Microsoft products contain piracy prevention features that can be checked with the help of the Windows Comparison Guide, the Office Comparison Guide and the Installed Microsoft Software tool.


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